Chemistry lab
I. Isotopes of "Pennium" II. Purpose: Determine the percent abundance of each of the two "isotpes" of the "pennium". III. Safety: Handle the triple beam balance with care. VI. Materials: Pennies from before 1980 and pennies after 1980, beaker, calculator V. Apparatus: Triple beam balance VI. Procedure: SEE LAB HANDOUT. VII. Obsevations: pennium- 2.925 70's- 3.00625 90's- 2.575 x(3.00625) + y(2.575)= 2.925 x + y = 1 - y - y x = 1 - y (1 - y)(3.00625) + y(2.575) = 2.925 y = -.08135 VIII.